I remove the old cotton, heat them and quench them under water ...do this a few times in a row removes most of the gunk,
then I heat slighty, stop and scrub them with a wire brush
heat again and quench under water
Works for me (just don’t go crazy heating SS coils warm glow only)
Finlly I heat them a bit to dry the coil off and clean up the deck with a paper towel
Also risnse off and clean the rest of the atty while I’m at it so it’s fresh
Probably the best way.. Personally.. I can't be arsed. I just dry burn til the smoke stops, blow off the dust, strum the coil and blow off any extra dust, wick and vape another 2 or 3 days.
So when you are actually buying your coils, Kingpin is the way to go, when you can make your own fused clapton, you tend to get lazy with cleaning, since you can make and install 2 coils from scratch in about 3 to 4 minutes.
(Just wait until i get that wire wrapping tool... LOL Then i can do some fancy stuff. )